Analog to digital converter
The output signal of AD8307 RF power detector, integrator and DC amplifier section needs to be digitized, before the PC acquisition. In order to achieve good results with Radio Skypipe acquisition software, following circuit were adopted, as suggested by the software author on its web site. It use the MAX187 AD converter.
A full schematic for this circuit can be downloaded here: MAX187 AD circuit
It's detailed description can be found on Skypipe web site at link:
http://www.radiosky.com/dcla2d.html
The A/D works fine also if particular attention should be used in grounding and shielding of its box and interconnecting cables.